* {
    box-sizing: border-box;
}

html {
    font-family: 'Roboto', open-sans;
}

body {
    margin: 0;
}

header {
    background: #023d6d;
    color: white;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
    width: 100%;
}

#results,
#calculator {
    margin: 2rem auto;
    width: 40rem;
    max-width: 90%;
    border: 1px solid #023d6d;
    border-radius: 10px;
    padding: 1rem;
    color: #023d6d;
}

#results {
    text-align: center;
}

#calculator input {
    font: inherit;
    font-size: 3rem;
    border: 2px solid #023d6d;
    width: 10rem;
    padding: 0.15rem;
    margin: auto;
    display: block;
    color: #023d6d;
    text-align: center;
}

#calculator input:focus {
    outline: none;
}

#calculator button {
    font: inherit;
    background: #023d6d;
    color: white;
    border: 1px solid #023d6d;
    padding: 1rem;
    cursor: pointer;
}

#calculator button:focus {
    outline: none;
}

#calculator button:hover,
#calculator button:active {
    background: #084f88;
    border-color: #084f88;
}

#calc-actions button {
    width: 4rem;
}

#calc-actions {
    margin-top: 1rem;
    text-align: center;
}
